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Dehumidifier
Koštuřík, Adam ; Elcner, Jakub (referee) ; Hejčík, Jiří (advisor)
This bachelor thesis shall inform readers with the theory of humid air and its dehumidification at low temperatures. Here are the basic ways to dehumidify the air and then is selected a device that is suitable for low temperature conditions. Humidity problems in refrigerated areas are also described here.
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Mathematical Model of Membrane Distillation
Hvožďa, Jiří ; Komínek, Jan (referee) ; Kůdelová, Tereza (advisor)
Diplomová práce se zabývá membránovou destilací, především z matematické perspektivy. Jedná se o tepelně poháněný separační proces, ve kterém se pro rozdělení kapalné a plynné fáze používá porézní membrána. Kapalina se vypařuje a její plynná fáze prochází přes póry v membráně. Během tohoto procesu dochází k tepelné i látkové výměně, které jsou popsány systémem parciálních diferenciálnich rovnic. Další model je založen na analogii s elektrickými obvody, zákonu zachování energie, hmotnostní bilanci a empirických vztazích. Je ověřen s experimentálně naměřenými daty z nové alternativní destilační jednotky používající membránu a kondenzátor z polymerních dutých vláken. Výkon a účinnost jednotky jsou vyhodnoceny. Další možná vylepšení jsou navržena.
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Optimization of air conditioning of the ice stadium
Zach, Daniel ; Rubinová, Olga (referee) ; Blasinski, Petr (advisor)
This diploma thesis is divided into three parts: theoretical, calculation and experimental measurement. The issue of humid air and air-conditioning in winter stadiums is elaborately analysed in the theoretical part. In the calculation part, the dessertation focuses on the optimization of current draft of hockey hall air conditioning system. The hall is now in operation during the season, which means from September to March. In the dissertation are discussed two variants of the draft. The first variant is draft upgrade to year-round operation with condensing dehumidification. The second option is solved as a combination of air handler unit system and absorption dehumidification. This variant is also designed for seasonal and year-round operation of the ice rink. At the end of the dissertation are all of them compared in terms of annual costs. The experimental measurement is carried out on dehumidification of air from areas with high water gains, in this case swimming pool hall model. This problematics is solved by changing the speed of ventilator and using Peltier generator.
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Physical properties and combustion characteristic of fuels
Nejezchleb, Radek ; Skryja, Pavel (referee) ; Kermes, Vít (advisor)
The subject of this bachelor’s thesis is creating an open calculation tool for determination of elementary properties of gas fuels and calculation of basic combustion characteristics. The theoretical part is focused on chemical equations by combustion, basic equations for calculation of process in gases and calculation of heating value, explosive limits and Wobe index. The most used gas fuels are described furthermore. The next part of bachelor’s thesis is focused on oxidant, especially on the calculation of composition of moist air and mixing of air and oxygen. Equations for the computing of enthalpy of gases and adiabatic heating temperature are noted at the end of the theoretical part.
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Methods of dehumidification of indoor pool
Vrzal, Martin ; Bělka, Miloslav (referee) ; Pech, Ondřej (advisor)
The bachelor thesis deals with design of suitable method of dehumidification of indoor pool. The theoretical part includes an introduction to the issues of microclimate, humid air, humidity transfer and methods of dehumidification. The practical part is focused on calibration of measuring sensors and measurement of proposed quantities in the family house with indoor swimming pool. In the thesis is introduced a calculation of amount of evaporated water by several methods, after that results were compared. In the conclusion of this thesis is proposed suitable method of dehumidification of the family indoor pool based on calculated quantities of evaporated humidity.
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Moist Air Processes in Air-Conditioning Equipment
Trepka, Petr ; Košner, Jan (referee) ; Janotková, Eva (advisor)
Bachelor thesis in the introductory part deals with the general theory of moist air, analysis of possible isobaric modifications of humid air and their representation in the h-x diagram. Bachelor thesis further contains the distribution of air-conditioning equipment, including a brief description. Thesis also includes an overview of air-conditioning systems, a description of their advantages, disadvantages and usage possibilities, focusing especially on the air system. In the final part is the dimensioning calculation of air-conditioning equipment in single-channel air system.
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Use of flue gas from gas microturbine for direct drying
Těthal, Josef ; Máša, Vítězslav (referee) ; Kuba, Pavel (advisor)
This master‘s thesis deals with the problematic of flue gas produced by a gas microturbine which is used as a drying media for general drying. Flue gas needs to be cooled to specific temperatures. The computing part of this work includes solving the microturbine and the mixer. Further part contains bilance solution of a general dryer for resolving the output parameters of wet flue gas. In the last part, the problematic of drying in a laundry facility is described, along with using the flue gas for drying at the specific clothes dryer Primus T24 G.
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Mathematical Model of Membrane Distillation
Hvožďa, Jiří ; Komínek, Jan (referee) ; Kůdelová, Tereza (advisor)
Diplomová práce se zabývá membránovou destilací, především z matematické perspektivy. Jedná se o tepelně poháněný separační proces, ve kterém se pro rozdělení kapalné a plynné fáze používá porézní membrána. Kapalina se vypařuje a její plynná fáze prochází přes póry v membráně. Během tohoto procesu dochází k tepelné i látkové výměně, které jsou popsány systémem parciálních diferenciálnich rovnic. Další model je založen na analogii s elektrickými obvody, zákonu zachování energie, hmotnostní bilanci a empirických vztazích. Je ověřen s experimentálně naměřenými daty z nové alternativní destilační jednotky používající membránu a kondenzátor z polymerních dutých vláken. Výkon a účinnost jednotky jsou vyhodnoceny. Další možná vylepšení jsou navržena.
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Dehumidifier
Koštuřík, Adam ; Elcner, Jakub (referee) ; Hejčík, Jiří (advisor)
This bachelor thesis shall inform readers with the theory of humid air and its dehumidification at low temperatures. Here are the basic ways to dehumidify the air and then is selected a device that is suitable for low temperature conditions. Humidity problems in refrigerated areas are also described here.
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